Lock-side-seam key-opening can.



. PATENTED JULY 9, 1907-- G. -P. HURLEY. LOCK SIDE SEAM KEY OPENING CAN.

APPLICATION FILED MAY 25, 1906.

[lb B 2 z fl UNITED STATES PATENT OFFICE.

CHARLES P. IIURLEY, OF CHICAGO, ILLINOIS NEW YORK, N. Y., A GORPLOGK-SIDE-SEAM KEY-OPEN IN G CAN.

No. 859,297. v Specification of Letters Patent.

Application filed May 25, 1906. Serial No. 318,

To all whom it may concern:

Be it known that I, CHARLES P. HURLEY, a citizen of the United States,residing in Chicago, in the county of Cook and State of Illinois, haveinvented a new and useful Improvement in LockSide-Seam Key-Opening Cans,of which the. following is a specification.

This invention relates to improvements in key opening cans, and moreparticularly to improvements in lock seam key opening cans.

l0 Heretofore in the practical manufacture and use of lock seam keyopening cans, such, for example, as shown and described in the Nortonpatent No: 539,366

or the McDonald patent No. 543,347, great difficulty has beenexperienced in making the cans hermetically tight at the point in thesoldered side seam Where the tongue is located and where the scaminstead of being of a true lock seam form is really of a lapseam form orcomposed of but three thicknesses. The leaks in the soldered seam atthis point we have discovered are largely due to the cavity or openspace left between the two inner folds of the lock seam and to theconsequently imperfect contact between the lapping or tongue member ofthe seam and the adjacent fold of the seam at this point. And we havediscovered and demonstrated by practical experiments that thedifliculties heretofore experienced may be entirely avoided or overcomeby forming the outer or lapping tongue mpmber with an exterior counter-I sink or depression so as tobring all three folds or thicknesses of thestock at the lapping or tongue portion in snug close contact with eachother, time onabling perfect soldering to be performed. This externalcountersink or depression at the lapping tongue portion of thekey'opening lock seam can is preferably formed of a truncated triangularshape corresponding to the notches at the base of the tongue in theinturned fold of the lock seam.

In the accompanying drawing forming a part of this specification, Figure1 is a perspective view of a 4 0 lock seam key opening can bodyembodying our invention. Fig. 2 is a horizontal section on line 2-2 ofFig. 1. Fig. 3 is a vertical section enlarged on line 3-3 of Fig. 1.Fig. 4 is a detail view of the blank in the flat and Fig. 5 is a partialdetail view of the blank after the hooks or edge folds are formed at theends thereof, which are interengaged and bumped or squeezed together toform a lock seam.

In the drawing, A represents a lock seam key opening can body having thecustomary hooks or edge folds a a at the meeting ends of the blank whichare hooked together or intcrengaged and then bumped or squeezed to formthe lock side seam a of the can body.

B is the tearing strip having the customary project- ASSIGNOR TO AM TIONOF NEW JERSEY.

IAN COMPANY, OF

Patented July 9, 1907.

off or bounded by scores or to adapt it to separate from the tearingstrip is wound upon a The can body achside of the ferably to the depthrmit the hook to be the tongue band the ing tongue b and marked weakenedlines b b can body when the wire or other key in t1 A is furnishe tongueb at the base th of the hook or re usual manner. (1 with notches b on eedge fold a to pe turned or folded without. folding parts to be properlytogether or The side seam a of fourfolds or thi length of the side swhich spans the t the seam is composed of three drawing, the severalthicknes are indicated, beginning from erence letters a a a a thethickness or fold a space extending across th notches b at the basethickness or fold a angular form, as w drawing. And to side seam at thep tearing strip or tongue to be snugl compressed together, we provide anexternal countersink A triangular form, the exten pression correspondingsubs of the omitted [old a the side seam may b soldered hermeticallytigh across the tearing strip a it will be understood, is composedckn'esses of stock throughout the cam excepting for the ongue of the seeor folds of the seam the outside by the refand it will be observed thatd or wanting at the e tongue. Owing to the of the tongue, the omitted atthe tongue is of a truncated triill be readily understood from the causethe three folds a a a of the extending across the y, firmly and closelythe can body with preferably of a truncated of the countersink ordetantially to the thickness at this part. By this means, uccessfullyand practically t thrmlghout its entire length, nd tongue as well as atother ortion thereof opening can body having a A key opening sh lockededge folds or I i provided with i notches at the in cat metal can bodyhaving interiooks forming a lock a tongue tearing strip so of the tongueto the depth of the side scam, and

tearing strip, where or edge fold. said can body being provided with anexternal countersink or depression at the portion of theslde seamextending aeross the tearing strip and tongue. the several thicknessesor folds of the seam git. the tearing strip and tongue being in snugclose contact with each other so that the seam may be closely solderedthroughout its length, whereby leaks are prevented at the tongue tearingstrip portion oi. tin-soldered side seam, substantially as specified. I

4. A key opening sheet metal (an body having inten looked edge folds orhooks formed a lock side seam. and provided with a tongue tearing stripfurnished with notches at the base of the tongue to the depth of thehook or edge fold, said (all body being provided with an externalcountersink or depression at the portion of the slde'seam extendingacross the tearing strip and tongue to bring the several thicknesses orfolds of the seam at the tearing strip and tongue in snug close contactwith each other so that the seam may be closely soldered throughout itslength, said countersink or depression in the (on body being of atruncated triangle form, substantially as specified.

CHARLES P. MU RLIGY.

Witnesses ii. M. MllNDAY, I). lllfllcown.

